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Orientation-contingent color aftereffects mediated by subjective transparent structures.

Examined whether the orientation-contingent color aftereffect (the McCollough effect) could be mediated by subjective horizontal and vertical structure induced by the perception of transparency. Red vertical bars and green horizontal bars were alternated as an adapting stimulus. After adaptation, 6 Ss (aged 25-43 yrs) were asked to adjust the green and red saturation of a test pattern until they obtained a neutral gray. Results show that the McCollough effect was significantly greater in the valid transparency condition than in the invalid transparency conditions. Results suggest that the McCollough effect can be mediated by the subjective spatial organization that accompanies the perception of transparency. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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